The origin and advantages of the hex wrench

The Allen key is also called the Allen wrench. Common English names are "Allen key or Allen" and "Hex key". It exerts a force on the screw through the torque, which greatly reduces the user's strength, and is an indispensable tool in the industrial manufacturing industry. The Allen key is also called the Allen wrench. The common English name has the most important difference between "Allen key or Allen wrench" and "Hex key".

It exerts the force on the screw by torque, which greatly reduces the user's strength. It can be said that in the installation tools involved in the modern furniture industry, the hex wrench is not the most commonly used, but it is the best. When it comes to the origin of the Allen key, you must start with the hexagon socket screw. In some non-English speaking countries in Europe, it is actually the earliest Hexagon screw brand. An internal square screw is imported from the United States, but the price is very expensive.

In order to save costs, SPS decided to produce it. SPS founder HT Hallowell said in his memoirs: "We started trying to make some screws with square holes in the UK, but soon found that the screws would not be accepted in the US. So we decided to add six to the screws. Angled holes." Hallowell's interpretation of this history is ambiguous, but later speculation that SPS was modified to avoid patent disputes with internal square screws.

In short, SPS began tire wrench to produce the new hexagon socket screw and registered the trademark, which is taken from the "unbreakable" homonym, meaning "unbreakable." Afterwards, the hexagonal screws gradually replaced the inner four-corner screws to become the new industry standard, which is widely used in the manufacturing industries of automobiles, airplanes, machinery and furniture. When the hexagon socket screw appears, it needs a matching wrench. In the years when the "Unbrako" Hexagon Screws were popular in the United States, a variety of wrenches were made, but they did not have a uniform name.